GerminaR (version 1.4.2)

ger_UNC: Germination Uncertainty

Description

This function calculates the germination uncertainty in the germination process.

Usage

ger_UNC(evalName, data)

Arguments

evalName

Prefix of the names of the periods of evaluation.

data

The name of the data frame containing the data.

Value

It returns an vector with the values of Germination Uncertainty.

Details

The uncertainty index u is an adaptation of Shannon index measures the degree of uncertainty in predicting the informational entropy or uncertainty associated with the distribution of the relative frequency of germination (GOUVEA LABOURIAU 1983; LABOURIAU; VALADARES, 1983). Low values of u indicate frequencies with short peaks, i.e. the more concentrated the germination in time. Just a germinated seed changes the value of u. This means that u measures the degree of germination scattering.

References

GOUVEA LABOURIAU, L. L. G. L. A germinacao das sementes. Washington: [s.n.]. LABOURIAU, L. G.; VALADARES, M. E. B. The germination of seeds. OEA, Washington, DC, 1983.

Examples

# NOT RUN {
library(GerminaR)
dfr <- prosopis
unc <- ger_UNC(evalName = "D", data = dfr)
unc
# }